Position-sensitive photodetector and light transmissive tablet and light-emitting pen
First Claim
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1. A tablet type data input/output device comprising:
- a tablet portion comprising a rectangular position-sensitive photodetector and a light transmissive planar display element disposed on said photodetector, said photodetector comprising a substrate, a first resistance layer disposed on said substrate, an amorphous semiconductor layer disposed on said first resistance layer, and a second resistance layer disposed on said amorphous semiconductor layer, said first resistance layer being provided at opposing edges thereof in a predetermined first direction with a pair of first electrodes each for taking out an output signal, said second resistance layer being provided at opposing edges thereof in a second direction perpendicular to said first direction with a pair of second electrodes each for taking out an output signal;
a light emitting pen for irradiating a light spot onto said tablet portion so as to indicate a data input position;
detecting means for detecting the data input position indicated by said light emitting pen based on the output signals taken out from said first and second electrodes;
display control means for controlling display of said planar display element; and
data transmitting means for transmitting output of said detecting means for subsequent processings.
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Abstract
The data input device comprises a tablet portion made of a two-dimensional position-sensitive photodetector and a planar display element laid one on the other, and a light emitting pen forming a light spot on a light-receiving surface of the position-sensitive photodetector. The locus of the movement of the light emitting pen is displayed on the surface of the planar display element at correspond positions in accordance with the output of the two-dimensional position-sensitive photodetector, and the contents of the display provided on the planar displaying element are allowed to be delivered for subsequent processings.
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Citations
15 Claims
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1. A tablet type data input/output device comprising:
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a tablet portion comprising a rectangular position-sensitive photodetector and a light transmissive planar display element disposed on said photodetector, said photodetector comprising a substrate, a first resistance layer disposed on said substrate, an amorphous semiconductor layer disposed on said first resistance layer, and a second resistance layer disposed on said amorphous semiconductor layer, said first resistance layer being provided at opposing edges thereof in a predetermined first direction with a pair of first electrodes each for taking out an output signal, said second resistance layer being provided at opposing edges thereof in a second direction perpendicular to said first direction with a pair of second electrodes each for taking out an output signal; a light emitting pen for irradiating a light spot onto said tablet portion so as to indicate a data input position; detecting means for detecting the data input position indicated by said light emitting pen based on the output signals taken out from said first and second electrodes; display control means for controlling display of said planar display element; and data transmitting means for transmitting output of said detecting means for subsequent processings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A tablet type data input/output device comprising:
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a tablet portion comprising a planar display element and a light transmissive rectangular position-sensitive photodetector disposed on said planar display element, said photodetector comprising a substrate, a first resistance layer disposed on said substrate, an amorphous semiconductor layer disposed on said first resistance layer, and a second resistance layer disposed on said amorphous semiconductor layer, said first resistance layer being provided at opposing edges thereof in a predetermined first direction with a pair of first electrodes each for taking out an output signal, said second resistance layer being provided at opposing edges thereof in a second direction perpendicular to said first direction with a pair of second electrodes each for taking out an output signal; a light emitting pen for irradiating a light spot onto said tablet portion so as to indicate a data input position; detecting means for detecting the data input position indicated by said light emitting pen based on the output signals taken out from said first and second electrodes; display control means for controlling display of said planar display element; and data transmitting means for transmitting output of said detecting means for subsequent processings. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification